Gas fire for heating and other purposes



(No Model.) 2 Sheets-Sheet 1.

0. F. GRANT.

GAS FIRE FOR HEATING R OTHER PURPOSES. No. 457,081. Patented Aug. 4,1891.

2 Sheets-Sheet 2.

- (No Model.)

0. P. GRANT. GAS FIRE FOR HEATING OR OTHER PURPOSES.

No. 457,081. Patented Aug. 4, 18 91 WITIVIESSES: INVENTOI? H V BY @660 1ATTORNEY.

5o attachments to be adjusted.

UNITED STATES PATENT OFFICE. I

OSCAR F. GRANT, OF PITTSBURG, ASSIGNOR OF ONE-HALF TO FRANCIS J.TORRANCE, OF ALLEGHENY, PENNSYLVANIA.

GAS FIRE FOR HEATINGAND OTHER PURPOSES.

SPECIFICATION forming part of Letters Patent No. 457,081, dated August4, 1891. Application filed November 4. 1390- Serial No. 370,358. (Nomodel.)

To all whom, it may concern: 7

Be it known that I, OSCAR F. GRANT, a citizen of the United States,residing at Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements in GasFires for Heating and other Purposes; and I do declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same, reference be- 'ing had to the accompanying drawings, and

to the letters of reference marked thereon, which form a part of thisspecification.

My invention relates to that class of stoves intended to occupy theposition of the ordinary fire-place, although it may be used in anyother situation. It is constructed for the consumption of gas only.

In the drawings like letters of reference refer to like parts.

Figure 1 is afront view with one-half of the exterior ornamental partsremoved to show the construction. Fig. 2 is a vertical section. Fig. 3is a cross-section just above the burner, and Fig. 4 is a cross-sectionof the burner on an enlarged scale.

The main body of the stove is formed of three pieces, to which all theothers, with the exception of the shutter, are attached.

A is the front part, of an arched form, with the cross-bar ct at aboutone-third of the height of the opening from the floor and having thefitting flange 13 around its outer edge. This fitting flange for aportion of the way on each side is recessed to receive the sides of thedividing-plate C, which conform in outline to it, and when in place forma level sur face for the flange of the back plate D to rest upon. At itsupper end the plate 0 inclines forward into the body of frame A belowthe air-passages c c, and is packed securely and bolted at the center tothe front of A. The back plate D is similar in form to the front of thestove, but shallower in depth of projection, and has a solidback, savewhere the collar F passes through, on which the pipe is placed. It hasat its lower part a square recess E to allow the gas-supply pipe P andThe pipe-collar F is bolted to the dividing-plate O at d, and

when this attachment is made and joints are properly packed the threeplates are united by bolts passing through the flanges B at b b and thebody of the stove is formed. The cross-bar ct of the front is of aT-section, the lower side of the inside flange thereof acting as a stopagainst and to which the burner is attached, while the upper side actsas a step to receive the lower edge of the grate G. The top of the frontassumes a hood-like projection, a portion of which is pierced withair-openings c c, and the arched part forming the sides has similaropenings for the same purpose.

The stove is ornamented with plates H H, fastened upon the sides of thefront piece. All of these that extend above the level of the burner areof an open-work design, the spaces permitting the passage of the heatedair. They are secured by screws, which pass through them and enter thebossesfff on the front. They may also have tile ornaments e e.

The burner K is formed of two pieces, which are bolted together. It hasa long opening is extending the full front of the fire. Its constructionis shown best in the enlarged section Fig. 4, where L is the upper partand M the lower part. The gas-supply is introduced at both ends of thisburner and fills the. spaces N N. The conical partition 0 of the lowerpart admits a free supply of air. The cone on the top part overhangs andextends above the top of the lower one. A fine opening is allowed forthe escape of gas along the sides between the two cones at s, fromwhence it issues, and is by the construction compelled to impinge uponand mix with the column of air rising through 0, thus preparing it inthe best manner for the production of heat when it reaches the point ofcombustion at 7c, the top of the burner. The supply being at both ends,the tubing is by ordinary fitting carried to the center under theburner, and there by means of a'T is connected with a larger pipe P andthe usual ai r-mixer, which extends backward through the opening E or inany direction required to attach to the supplypipe.

The dividing-plate 0 forms also the back or fire plate of the stove, andhas a project- IOC mg curvat re Z at the top of the fire to cause theheat to flow outward. It has also the ribs m m in a vertical position toadd strength. At its base on the rib n are lugs o 0. These are at thesame height and parallel with the rib on the cross-bar of the front andserve to stop and secure the back of the burner, which is fastened to itby screws in the lugs.

The grate G is an open-work piece rising from the front edge of theburner, resting between it and the cross-bar of the front, and is heldat the top by being bolted to two lugs on the main front piece at p 1).When in place, it leaves an open space below the hood projection of thefront, which allows the filling of the space between the grate and thedividing-plate or fire-back with refractory material, such as fire-clayballs or pieces of pottery,'&c. By taking out the bolts it is readilyremoved.

In operation, the gas being ignited causes an upward rush of air throughthe cone opening 0. The gas enters some distance below the top of theburner and at an angle to the moving air. It and the air are thoroughlycommingled and the result is a complete combustion, which produces anintense heat at the base of the mass of refractory material held withinthe grate, and it becomes of a white heat from base to top, radiatingfrom thence into the room. The fireback or dividingplate becomesred-hot, and the air between it and the back being heated rises andescapes into the apartment through the passages c c in the top, thuscreating a vacuum and cansing a flow upward through the side ducts R Rat the base and a continuous flow of heated air is created.

I am aware that burners have been constructed with a central flow of airthrough a cone-shaped opening, but as the air is carried above the pointof combustion there is no economy in their use, as the fluids have butslight opportunity to mingle. In my burner the discharge of gas is adistance below the final exit or point of combustion, and the inwardslope of the top part of the burner at .9 causes the impact of thoescaping gas upon the ascending flow of air through 0, enforcing acommingling of the two fluids, thus producing an intense flame andperfect combustion of the gas admitted, the supply of which may bereduced to the lowest amount required to keep the fire in operation.

As it is evident that my burner can be made of many varieties of shapeand form and still retain the vital point-that of admitting the gasbelow the point of combustion and forcing it by inclined walls to animpact upon the inflowing air, and thus causing the mingling of the twofluidsI have shown in Figs. 5, 6, 7. and 8 certain variations, but donot confine myself to themalone, as the forms may be changed to allshapes imaginable. Fig. 5 is a top view of a round form, and Fig. 6 is asection of the same through the line X Y and shows the piping for twopoints of supply, although one point of supply can be used. Fig. 7 is atop view of a square burner with two long openings for burning, and Fig.8 is a long burner with three openings.

The shutter S is a loose piece with open work ornamentation to act as afender, closing up the front below the cross-bar a and hiding thefittings, &c., below the burner. It rests upon the hearth and upon thefront, covering the projecting feet T T that assist in supporting thestove.

Although I have herein shown the best application of my fire for heatingpurposes, it can also be used for cooking, baking, &c., by adapting theburner to such particular cases, and the outer ornamental plates H H canbe of any ornamental design, so that the airopenings are retained.

Having thus described my invention, I claim and desire to secure byLetters Patent" A gas-burner for fire-places, composed of two partsbolted together, having a space for gas between, connected with a sourceof supply, the lower part provided with an air-opening conical insection and the upper part provided with a matching opening of similarsection, but with the walls'thereof at aless incline to the verticalthan those below, and the upper edges of which form the point ofcombustion, a thin narrow slot thus being formed for the escape of thegas at some distance below this point formed by the top edge of theair-opening coming nearly in contact with the sides of the cone above,whereby the gas is discharged at opposing angles from each side into thecolumn of ascending air, thus compelling a mingling of the two fluids,substantially as and for the purpose herein set forth.

In testimony whereof I affix my signature in presence of two witnesses.

OSCAR F. GRANT.

Witnesses:

LOUIS MOESER, HENRY KLEIN.

